Cooling Mode - Midea MSV1-09HRFN1-MT0W Service Manual

8.5 Cooling Mode

8.5.1 The operation frequency of compressor after starting submits to following rule.
When the machine is running and ΔT(=room temp. – setting temp.) changes, the frequency of compressor will
rise or descend a grade (7 minutes after starting).
After start, if ΔT stays in a zone for 3 minutes, the frequency will change as follow:
Zone A : Current frequency rise a grade till the maximum grade.
Zone B: Elevate or keep or descend the frequency of compressor.
Zone H: Compressor stops after running as the minimum frequency for 60 minutes or ΔT is less than -2℃.
8.5.2 Indoor heat exchanger anti-freezing function.
If T2 is lower than 0℃, the compressor stops and resumes when T2>5℃.
8.5.3 Outdoor unit current control in cooling mode.
Remark:
9K Model
12K Model
8.5.4 Rating capacity test function
1) Set the indoor unit with remote controller as: high fan, 17℃ in cooling mode, then press "TURBO" button
on controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine
3.5
3.0
-0.5
-1.0
I3COOL
I2COOL
I1COOL
I1COOL
4.5A
5.2A
A
B
H
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
I2COOL I3COOL
6.0 A
6.4 A
7.0 A
7.5 A
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